Strap-end connection



" 'April 9, 1929. c. A. RASTALL STRAP END CONNECTION Filed June 20, 1928 Patented Apr. 9, 1929.

" Unirse lSTATES CHARLES A. RASTALL, OF OAKLAND, CALIFORNIA.

STRAP-END' CONNECTON.

peleation filed June 20, 1928. Serial No. 286,580.

The invention relates .to a new and improved way of securing a metal strap around an object, for instance, around a piece ot rubber hose, to clamp it upon a nipple or pipe. Heretofore, it has been customary to make vuse ci hose clamps for this purpose, provided with bolt-s or screws whereby they may be contracted to clamping position. Often, the conditions under which the joint Inu'st be used, are such that the bolt or screw and the lugs with which it is engaged, are very much in the way' and are subject to being struck and injured. Tt is therefore the object oit my invention to provide an improved way of securing the ends of a 'liat metal stra-p in overlapped relation with each other, so that no parts project beyond the overlapped ends. Thus, when clamping a hose et four or five inches dialneter, for instance, the joint will occupy approximately one inch less diameter than ordinarily.

TWith the foregoing in view, the linvention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawing.

Fig. l is a side elevation of a joint enibodying three ot the metal straps each havingits ends secured together in accordance with my invention.

Fig. 2 is a sectional view on line 2-2 of Fig. l.

Fig. 3 is a detail section on line 3 3 of F ig. 2, showing a slightly different construction.

Fig. a is a detail section similar to a portion of Fig. 2, showing' a slightly different torin oi construction.

Fig. 5 is a detail sectional view on line 5 5 of Fig. 4L.

Three of the improved hose clamps C have been shown in Fig. l, but as they are identical, only one will be described.

The clamp embodies a metal strap G having overlapped ends 7 8. The numerals 9 denote two openings formed in the strap end 7 and 10 denotes one of a pair of openings in the strap end 8, alined with the openings 9, the commen axis of these alined openings being at an acute angle to the contacting faces of the strap ends 7 8. Pins ll are inserted through the alined openings 9 1() and are flush with the inner and outer sides ot the strap. As shown in Fig. 2, the angular positioning et each pin 1l, is such as to cause the portion of said pin projecting,r beyond either strap end into the opening of the other strap end, to constitute an inwardly directed, acute hook, which tends to enter the opening to the maximum upon expanding strain exerted upon the clamp or strap. Hence, the strap ends are held against separation from each other and they cannot become accidentally disconnected.

In addition to having the openings and the pins 1l at an acute angle to the contacting faces of the strap ends in a plane longitudinallyof the latter, said pins and openings are preterably acute to said contacting faces, transversely ot the latter, as illustratcd in Fig. 3, the pins being shown in outwardly diverging relation in this view.

One pin in some instances will suffice, but any desired number may be used. 1n addition to those specifically described, the form ot construction shown in Figs. 1, 2 and 3 illustrates two additional pins 11n bearing the same relation with the strap and with each other, as the pins ll, and still another pin 1lb related with the strap ends in a manner similar to the relation above described.

F et, and 5 disclose a construction in which twopins l1 extend radially of the strap when viewed in longitudinal section of the latter as in Fig. 4 but are at acute angles to the strap ends and diverge from each other when viewed with the strap in transverse section as shown in Fig. 5. This relation et pins and appropriately positioned receiving openings therefor, holds the strap ends against separation and as they cannot thus become disconnected, the collar, strap or clamp is effectively held in its contracted position.

In applying the clamp, the strap G is placed around the object to be held, Jfor instance, around a hose H surrounding a nipple or the like N. Then, preferably by the use of an appropriate clamp, the strap is contracted with its ends in overlapping relation and is held in this contracted position until the desired number of the openings are drilled through the overlapping strap ends, positioning said openings at the proper acute angles with respect to the contacting faces of said strap ends. Then, while the strap is still held in contracted position, the pins are inserted in the openings, whereuponthe strap is released and will be tenaciously held contracted around the hose or the like.

lilhile the details disclosed are preferable, variations may be made Within the scope of the invention as claimed.

I claim:-

l. A hose clamp comprising' a metal strap having overlapped ends each formed With two opeuings,oue opening of one strap end being alined With one opening` of the other strap end, and the other openings of said strap ends being` also alined, the common axis of tivo of the alined openings being` in diverging relation with the common` axis of the other two alined openings, and diverging' pins snugly received in said alined openings.

2. A structure as specified in claim l; said pins and said axes of said openings being' at acute angles to the contacting faces oiirthe strapL ends both longitudinally and transversely of said faces.

3. A hose clamp comprising a metal strap having' overlapped ends, said ends having aliued openings Whose common axis is disposed at an acute angle to the length of the strap, and a pin of Vuniform diameter throughout its length snugly received in said opening' and havingits, outer end flush Vwith the exterior-of the clamp, the portion of the pin projectingl from either strap end into the opening oi" the other strap end constituting a hook in'xed acute angular relation with the circumference of theY clamp and tending to move to the maximum into said openingof the other strap under expanding` stress Vou the clamp. A,

In testimony whereof l have hereunto vaffixed my signature.

CHARLES AQ RAsTALL. 

